Dynamo-electric machine



(No Model.) 3 Sheets-Sheet 1.

R OLIVER DYNAMO ELECTRIC MACHINE.

No. 384,638. Patented June 19, 1888.

3 Sheets-Sheet 2.

(No Model.)

B. OLIVER.

DYNAMO ELECTRIC MACHINE.

No. 884,638. Patented June 19, 1888.

INVENTOR: W @M.

ATTORNEY.

@WITNESSES:

TERS, Phwmn ph n wmin m. n4;

(No Model.) 3 Sheets-Sheet 3.

' R. OLIVER.

' DYNAMO ELECTRIC MACHINE.

No. 884,638. Patented June 19, 1888.

INVENTOH: W 54K.

BY ATTORNEY. 4

UNITED STATES PATENT OFFICE.

ROBERT OLIVER, OF

ALPENA MICHIGAN.

DYNAMO ELECTRIC MACHINE.

SPECIFECATION forming part of Letters Patent No. 384,638, dated June 19, 188$.

Application filed June 2, 1887.

To aZZ whom, it may concern.-

Be it known that 1, ROBERT OLIVER, of Alpena, in the county of Alpena and State of l\lichigan, have invent-ed new and useful Improvements in Dynamo-Electric Machines; and I do hereby declare that the followingis a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to certain new and useful improvements in dynamo-electric machines; and the invention consists in the improved construction and arrangement of parts hereinafter described, and specifically set forth in the claims.

In the drawings which accompany this speci fication, Figure l is a vertical central longitudinal section of my improved machine. Fig. 2 is an end elevation of the machine. Fig. 3 is a cross-section through the armature. Fig. a is a detail on a large scale showing the manner of securing the bobbins.

The machine consists of a disk-armature re volving between fixed field-magnets arranged on either side thereof. The disk-armature is constructed as follows: Upon asolid shaft, A, mounted in suitable hearings in the frame B and provided with the drive-pulley O, is secured the armature-core, which consists of the cast-iron skeleton wheel D. This wheel is provided with a series of rectangular recesses open at the sides and face of the wheel and of suitable dimensions to receive and hold in position the bobbins E, all so arranged that they can readily be taken out without unwinding any wire in case of an accident and replaced in a few minutes. These bobbins are held in their recesses by the sectional retaining-plates F, which are of wrought-iron and fastened with screws 0 to the armaturecore, which is suitably recessed upon the sides to make the sides of the armature-disk flush. The bobbins E have iron tips F, and the plates Fproject over these tips and form an iron connec tion all around.

The wheel or core D is also provided witha deep groove, G, in the portions between the bobbins, and this groove communicates with the air-holes o: in the retaining-plates F.

Around the rim of the wheel I) and suitably secured thereto is placed a ring, P, of insulat= ing material, and to this ring I secure the com mutator-strips H. The bobbins are all wound in one direction and connected in pairs, as shown.

I are the brushes secured to the curved rocker'arm I, which is adjustably secured to the shoe K, and the latter is adj ustably secured upon a rock-shaft, L, secured in the frame of the machine.

The field of force consists of four fixed magnets, M, arranged in pairs upon opposite sides of the armature-disks. The magnets have cast-iron cores and are provided with segmental wrought-iron polepieces N, (see Fig. 2,) detachably secured thereto, to permit of winding the magnets in a lathe.

Each magnet is independently secured to the frame of the machine and can be adjusted closer to the armature in any suitable manner, if desired, or at a greater distance therefrom. For instance, the magnets, as shown in Figs. 1 and 2, are secured to the standards by means of the screws .9. It is evident that if washers or shims t are interposed between the inner ends of the magnets and the standards the magnets may be adjusted from or toward the armature.

The advantage of my machine is its simplicity and compactness. The current being taken directly from the armature dispenses with a separate commutator and permits the use of a solid shaft. The bobbins, by being interchangeable and detachably secured, permit ready repair, in case of accident. In fact the whole machine maybe readily taken apart.

The commutator-strips, it will be seen, are solidly supported by the core of the armature.

"What I claim as my invention is-- 1. In a dynamoelectric machine, the re volving armature-disk consisting of a skeleton wheel provided with a series of rectangular recesses, a series of generating-bobbinssecured within said recesses, retaining-plates secured to the sides of the armature-core an insulat ingring secured to the rim of the skeleton wheel, and commutator-strips secured to the face of the insulatingring, all substantially as described.

2. In a dynamo-electric machine, the combination of a revolving armature-disk carrying a series of commutator-strips secured to the rim thereof, separately removable genpole-pieces and arranged in pairs upon oppoerating-bobbins secured in rectangular resite sides of the armature, substantially as de- .eesses of the iron core of the armature-disk, scribed.

sectional retaining-plates removably secured 5 to the sides of the armature-disk, and a fieldmagnet consisting of separately adjustable and removable magnets provided with detachable ROBERT OLIVER. Witnesses:

ALLAN M. FLETCHER, WILLIAM E. ROGERS. 

